or part number KTB0000YB1 (new part number, sold as a single unit, comprising 2 flat washers + 1 flexible washer + 1 breakable head screw)

KV trunking system:

Whenever you install or remove a bolt-on tap-off unit on a trunking joint, you must use a complete new jointing unit (including breakable head screw) for the connection. There are no spare parts. The bolt-on tap-off units can only be installed on trunking joints. Jointing units for straight feeder lengths are not the same as those for bolt-on tap-off units.